The 2023 wildfire season in Europe was one of the worst this century, with over half a million hectares scorched. The three worst years for wildfires in the century were 2017, 2022, and 2007. Fires intensified during the summer of 2023, especially in the Mediterranean region. Climate change is causing more frequent wildfires, with areas previously not considered fire-prone now being affected. Preliminary data for the first three months of 2024 show almost double the average number of fires. The wildfires in 2023 produced around 20 megatonnes of CO2 emissions, equivalent to a third of all emissions from international aviation in the EU in one year. The final 2023 report, including national contributions, will be published in the autumn.